* @return This request, never {@code null}.
     */
    @Override
    MetadataResolutionRequest setOffline(boolean offline);

    /**
     * Gets the artifact to resolve metadata for.
     *
     * @return The artifact to resolve metadata for or {@code null} if not set.
     */
    Artifact getArtifact();

    /**

        this.artifactId = artifactId;
        this.version = version;
    }

    /**
     * Gets the group id of the unresolvable model.
     *
     * @return The group id of the unresolvable model, can be empty but never {@code null}.
     */
    public String getGroupId() {
        return groupId;
    }

    /**
     * Gets the artifact id of the unresolvable model.
     *

 *
 * @deprecated use {@code org.apache.maven.api.services.ProjectBuilder} instead
 */
@Deprecated(since = "4.0.0")
public interface DependencyResolutionRequest {

    /**
     * Gets the project to resolve dependencies for.
     *
     * @return The project to resolve dependencies for or {@code null} if not set.
     */
    MavenProject getMavenProject();

    /**

        this.result = result;
    }

    /**
     * Gets the interim result of the model building up to the point where it failed.
     *
     * @return The interim model building result or {@code null} if not available.
     */
    public ModelBuilderResult getResult() {
        return result;
    }

    /**

 */
@Experimental
public interface Toolchain {
    /**
     * Gets the type of toolchain.
     *
     * @return the toolchain type
     */
    String getType();

    /**
     * Gets the underlying toolchain model.
     *
     * @return the toolchain model
     */
    ToolchainModel getModel();

    /**
     * Gets the platform tool executable.
     *

 */
@Experimental
public interface SettingsBuilderResult extends Result<SettingsBuilderRequest> {

    /**
     * Gets the assembled settings.
     *
     * @return the assembled settings, never {@code null}
     */
    @Nonnull
    Settings getEffectiveSettings();

    /**
     * Gets the problems that were encountered during the settings building. Note that only problems of severity

 */
@Experimental
public interface ToolchainsBuilderResult extends Result<ToolchainsBuilderRequest> {
    /**
     * Gets the assembled toolchains.
     *
     * @return the assembled toolchains, never {@code null}
     */
    @Nonnull
    PersistedToolchains getEffectiveToolchains();

    /**
     * Gets the problems that were encountered during the settings building. Note that only problems of severity

    String getName();

    /**
     * Gets the full URL of the artifact.
     *
     * @return The full URL of the artifact, never {@code null}.
     */
    String getUrl();

    /**
     * The size of the artifact in bytes.
     *
     * @return The of the artifact in bytes or a negative value if unknown.
     */
    long getContentLength();

    /**

 */
@Deprecated(since = "4.0.0")
public interface SettingsBuildingResult {

    /**
     * Gets the assembled settings.
     *
     * @return The assembled settings, never {@code null}.
     */
    Settings getEffectiveSettings();

    /**
     * Gets the problems that were encountered during the settings building. Note that only problems of severity

     * @return if it is a snapshot
     */
    boolean isSnapshot();

    /**
     * Gets the artifact quality this metadata refers to. One of {@link #RELEASE}, {@link #SNAPSHOT} or
     * {@link #RELEASE_OR_SNAPSHOT}.
     *
     * @return The artifact quality this metadata refers to.
     */
    int getNature();

    /**
     * Gets the policy that applies to this metadata regarding the specified repository.
     *